超声波激励下混凝土裂纹发热过程的试验研究和有限元分析  

Experimental Study and FEM Analysis for Heating Process of Concrete Cracks under Ultrasonic Excitation

作　　者：胡振华[1,2] 汤雷[3] 高明涛[4] 

机构地区：[1]河海大学岩土工程科学研究所,江苏南京210098 [2]河海大学 岩土力学与堤坝工程教育部重点实验室,江苏南京210098 [3]南京水利科学研究院,江苏南京210024 [4]山东新汶矿业集团有限责任公司,山东新泰271200

出　　处：《水利与建筑工程学报》2013年第2期58-61,75,共5页Journal of Water Resources and Architectural Engineering

基　　金：国家自然科学基金项目"选择性激励红外热像结构性隐性裂纹的发现方法"(51079087)

摘　　要：在混凝土超声红外热像试验基础上,针对混凝土试件特点,研究有限元数值计算方法,分析超声波激励下混凝土裂纹发热过程,对比发现试验结果和计算结果吻合的很好。说明建立的有限元数学模型合理,具有模拟内部缺陷发热过程的潜在能力,为超声红外热像检测技术在混凝土中的应用和推广提供了有价值的参考依据。The finite element numerical method is utilized here to analyze the concrete crack heating process under ultra- sonic excitation based on the experimental results of ultrasonic and infrared thermal imaging. Through comparing, it is found that the test results are matched well with the calculated results. All these as mentioned above could show the ratio- nality of the finite element model and the potential ability for simulating the internal defect heating process, and provide valuable references for the application and promotion of the ultrasonic and infrared thermal imaging technology in concrete detection.

关 键 词：超声激励 红外热像 微裂纹发热 有限元 瞬态温度场 

分 类 号：TU528[建筑科学—建筑技术科学]